US4139078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder assembly
Assignee: Individual
•
Filing: 1977-10-28
•
Granted: 1979-02-13
•
Expires: 1997-10-28
Abstract
Abstract A ladder assembly, primarily for use on trucks and other vehicles, has a ladder slidable between a retracted, stored position in a ladder storage assembly, and an extended, operative position in which the ladder projects from an extrance of the storage assembly. First and second retainers are provided for retaining the ladder relative to the storage assembly in the stored and operative positions, respectively, and the ladder has opposed lateral projections slidable along guides formed by parallel side members having U-shaped cross-sections the side members being spaced apart to receive the ladder therebetween and forming opposite sides of the storage assembly.
Inventors
- 👤 John R. Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:14
CPC Classifications
E; E06; E06C; E06C5/00; E06C5/02; B; B60; B60R; B60R3/00; B60R3/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A ladder assembly comprising: ladder storage means having an entrance at one end thereof, a ladder slidable relative to said ladder storage means through said entrance between a retracted storage position in said ladder storage means and an extended operative position in which said ladder projects from said ladder storage means, first retaining means for releasably retaining said ladder in said storage position, and second retaining means for retaining said ladder relative to said ladder storage means when said ladder is in said operative position, said second retaining means comprising a pair of wedge-shaped abutments respectively secured to said side members adjacent said entrance in the paths of movement of said projections during the sliding of said ladder, and said abutments having first surfaces inclined to said path to facilitate sliding of said projections over said abutments during movement of said ladder towards the operative position, and second surfaces transverse to said path for blocking return movement of said projections.
Claim 2
Dependent Claim
160 words
A ladder assembly comprising: ladder storage means having an entrance at one end thereof, a ladder slidable relative to said ladder storage means through said entrance between a retracted storage position in said ladder storage means and an extended operative position in which said ladder projects from said ladder storage means, first retaining means for releasably retaining said ladder in said storage position, and second retaining means for retaining said ladder relative to said ladder storage means when said ladder is in said operative position, said second retaining means comprising a pair of wedge-shaped abutments respectively secured to said side members adjacent said entrance in the paths of movement of said projections during the sliding of said ladder, and said abutments having first surfaces inclined to said path to facilitate sliding of said projections over said abutments during movement of said ladder towards the operative position, and second surfaces transverse to said path for blocking return movement of said projections.
Claim 3
Dependent Claim
70 words
A ladder assembly as claimed in claim 1, wherein said ladder storage means comprise a pair of elongate parallel side members spaced apart to receive said ladder therebetween, and said ladder includes a pair of opposed lateral projections disposed at opposite sides thereof and slidably engaging in said side members, whereby said side members act as guides for the sliding movement of said ladder between said stored and inoperative positions.
Claim 4
Dependent Claim
29 words
A ladder assembly as claimed in claim 2, wherein said side members have substantially U-shaped cross-sections for respectively receiving said projections through the open sides of said U-shaped cross-sections.
Claim 5
Dependent Claim
41 words
A ladder assembly as claimed in claim 1, wherein said first retaining means comprise a flexible elongate member secured at one end thereof to said ladder storage means, and a hook secured at the opposite end of said flexible elongate member.
Claim 6
Dependent Claim
39 words
A ladder assembly as claimed in claim 2, further comprising a pair of stop members secured to said side members at said entrance of said ladder storage means for preventing removal of said ladder from said ladder storage means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |